Are there any more "proofs" of an accelerated expansion of the universe other than:
$1:$ that galaxies that are farther away from us are also more redshifted.
$2:$ using "Baryon acoustic oscillations" to compare the sound horizon today with the sound horizon at the time of decoupling (using the CMB)?
Apologies if you know this already but your point 1 is unclear.
More distant galaxies being more red shifted than closer ones is evidence of expansion, not accelerated expansion. Uniform expansion would give this too. The evidence for accelerated expansion is that the relationship is not linear at greater distances. The redshift is actually less than you might expect for the more distant galaxies relative to their measured distance.
This article gives a good overview: https://www.pnas.org/content/96/8/4224
